The development and manufacturing capability of aeroengines embodies the country's comprehensive national strength and the level of cutting-edge science and technology and is also an important guarantee for national defense and security. Silicon carbide fiber-reinforced silicon carbide （SiC_f/SiC） composites have been developed as promising structural materials that are applied in the hot-end components of high thrust-to-weight ratio aeroengines， due to their high temperature capability， high strength， low density， high thermal shock resistance， etc. The typical service environment of high-temperature structural components in the new generation of high thrust-to-weight ratio aeroengines is extremely harsh， with the gas-side wall temperature reaching up to 1500 ℃； however， the reliable service temperature of the third generation of SiC_f/SiC composites is about 1350-1400 ℃. Therefore， it is necessary to apply a thermal/environmental barrier coating （T/EBC） system with high temperature resistance， low thermal conductivity， thermal expansion matching the matrix， and excellent corrosion resistance， which is expected to provide both thermal protection and gas corrosion resistance for the SiC_f/SiC composites. Rare earth oxide ceramic materials， such as rare earth phosphates， tantalates， hafnates， zirconates， aluminates， and pure rare earth oxides， exhibit high average atomic weight， weak atomic bonds， complex crystal structure， and high concentration of oxygen vacancies， etc. These properties fulfill the necessary requirements for protective coating materials， making them highly promising candidates for T/EBC applications and a key focus of current research.In this paper， the roadmap of development on T/EBC systems as well as various rare earth oxide ceramics is reviewed. Particularly， the thermal-mechanical and corrosion properties of rare earth oxide ceramics， such as elastic modulus， thermal expansion， thermal diffusivity， thermal conductivity， and corrosion resistance against CMAS melts， etc.， are comprehensively reviewed and discussed. Moreover， given that the thermal-mechanical properties and corrosion resistance of rare earth oxides are closely related to the type of rare earth elements， it is proposed that designing high-entropy rare earth oxides-based materials is a rational strategy to achieve a synergetic optimization of the thermal-mechanical properties and corrosion resistance of these materials. Specifically， by adjusting the ratio of various rare earth elements in high-entropy oxides， controlling the average size of ions in rare earth oxides， and comprehensively considering the thermophysical and corrosion resistance properties of various rare earth elements， the performance of the material can be flexibly modified， which further promotes their application in the next-generation T/EBC coating system.At last， by reviewing the current research stage， we propose that the future development directions of the next generation turbine components of aero-engines highly rely on the multi-level design and whole-process preparation technology of high-quality coatings， including the efficient screening of coating materials， the innovative architectural design and microstructure modulation for coatings， advanced coating spraying technology， and the discovery of new mechanisms to slow down the corrosion and damage rate of coatings under thermal-oxidation coupled environment， etc.， especially for the application of new T/EBC coatings at temperatures above 1500 ℃. These research and advanced technologies are expected to generate new breakthroughs in the development of T/EBC for high-temperature structural components made of SiC_f/SiC composites in next-generation aero-engines.